A diffuser to help spread the jet of a Vacmaster Cardio54/Air Mover. It's relatively subtle (the exit angle is ~30 degrees), but does diffuse the jet pretty well.
Two of the photos show it in use with the stand that allows you to use the fan sideways as well (see my other designs for that!).
Category: ToolsThe author marked this model as their own original creation. Imported from Thingiverse.